马鸿斌,魏福安,孙领兄

• 1:青海大学青海省新型轻合金重点实验室青海省高性能轻金属合金与成型工程研究中心

摘要(Abstract)：

采用X射线衍射(XRD)、光学显微镜(OM)、扫描电镜(SEM)、电子背散射衍射(EBSD)、透射电镜(TEM)及能谱仪(EDS)等研究了挤压态Mg-2Nd-4Zn和挤压态Mg-2Nd-2Zn合金以及经T4和T6处理后挤压态Mg-2Nd-2Zn合金的显微组织和腐蚀产物形貌，并利用电化学工作站测试其耐腐蚀性能。结果表明：挤压态Mg-2Nd-2Zn合金的耐腐蚀性能比挤压态Mg-2Nd-4Zn合金的更好，这主要是由于挤压态Mg-2Nd-2Zn合金中的第二相的数量比挤压态Mg-2Nd-4Zn合金少。挤压态Mg-2Nd-2Zn合金经T4处理后，第二相数量减少及弥散分布在基体中，提高了其耐腐蚀性能；挤压态Mg-2Nd-2Zn合金经T6处理后，耐腐蚀性能比经T4处理后更差，这主要是由于第二相的时效析出，数量增加；质量损失以及电化学测试结果也表明，T4处理后有效提高了挤压态Mg-2Nd-2Zn合金的耐腐蚀性能，这与腐蚀形貌变化规律一致。

关键词(KeyWords)： Mg-2Nd-xZn合金;热处理;第二相;耐腐蚀性能

Abstract:

Keywords:

基金项目(Foundation): 青海省应用基础研究项目(2022-ZJ-709)

作者(Author): 马鸿斌,魏福安,孙领兄

DOI: 10.13289/j.issn.1009-6264.2022-0498

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